ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,825, issued on Nov. 11, was assigned to II-VI DELAWARE INC. (Wilmington, Del.).

"Optical time domain reflectometry (OTDR) device and methods" was invented by Michael Cahill (Melbourne, Australia).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical time domain reflectometry (OTDR) device includes an optical transmitter, an optical receiver with multiple operating settings, an optical coupler, and a processor. The optical transmitter generates a probe signal comprising a train of pulses. The optical receiver generates time-varying measurements of a back-reflected signal resulting from injection of respective pulses of the probe signal into an opt...